The invention belongs to the field of aeroelastic mechanics and relates to a sweep frequency voltage estimation method for an aircraft structure modal coupling test. A sweep frequency voltage of the airplane structure modal coupling test is estimated, and reference input data is provided for carrying out the test; the method comprises the following steps of predicting a relation K among a control plane rotation modal inherent frequency fn, modal damping xin, a control plane steering engine cut-off frequency fc, a control plane characteristic length c, a maximum overload nmax which can be borne by a structure, a safety coefficient s, a sweep frequency range [f0, fmax], a sweep frequency voltage U and a control plane rotation angle theta; and estimating the sweep frequency voltage U. According to the method, a theoretical basis is provided for frequency sweep voltage estimation of an airplane structure modal coupling test, and support is provided for development of the test.
本发明属于气动弹性力学领域,涉及一种飞机结构模态耦合试验的扫频电压预估方法;预估飞机结构模态耦合试验的扫频电压,为开展试验提供参考输入数据;步骤如下:预知控制面旋转模态固有频率fn和模态阻尼ξn,控制面舵机截止频率fc,控制面特征长度c,结构能承受的最大过载nmax,安全系数s,扫频范围[f0,fmax],扫频电压U和控制面转角θ的关系K;预估扫频电压U。本发明为飞机结构模态耦合试验的扫频电压预估提供了理论基础,为试验的开展提供了支持。
Method for estimating sweep frequency voltage of airplane structure modal coupling test
一种飞机结构模态耦合试验扫频电压预估方法
29.06.2021
Patent
Elektronische Ressource
Chinesisch
IPC: | B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen |
Manual frequency sweep technique for measurement of airplane frequency response
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